Methods for controlling ash borer
Today's tip sharing: experience in planting flowers related to the control methods of ash borer, please see the detailed introduction below.
Methods for controlling ash borer
The larvae of the ash borer bore into the main tip of the seedlings, causing the lateral buds below the main tip to become the main stem and grow upwards. Later, the main stem of the infested ash seedlings may show symptoms of top curvature, severely affecting the quality and value of the seedlings. The occurrence of borers may be due to poor air circulation. In summer, Bordeaux mixture or wettable powder of zinc omethoate can be sprayed 2-3 times for good disease control.
Symptoms of ash borer
The larvae of the ash borer bore into the main tip of the seedlings, causing the lateral buds to replace the main tip and grow upwards to become the main stem, taking on a top curvature shape.
Harm caused by borers: The ash borer eats the main tip of the ash, which easily withers and dies. Moreover, the main stem of the affected ash seedlings is curved, severely affecting the quality and value of the seedlings.
Causes of ash borer
The reasons for the occurrence of ash borers may be due to neglecting to keep the surrounding environment clean during planting or due to poor air circulation.
What pesticide is effective for controlling ash borer
The ash borer can be cured by spraying potassium dihydrogen phosphate 800-1000 times solution during the seedling growth period for control.
Best time for controlling borers: Catch the ash borer when it emerges as an adult in early April, usually before 10 am or after 4 pm, as the adults are weaker and easier to catch at this time. In late April, observe the tender buds in the field, and immediately cut off any egg-laying branches and wilted top buds, and bury or burn them outside the field.
If the ash seedlings do not leave the garden in autumn, deeply turn over the tree pans to expose the overwintering adults of the ash borer to the ground and freeze them to death.
Preventive measures for borers: Ash seedlings should be planted in time, with earlier strengthening of fertilizer and water management. In autumn, clean up the diseased and fallen leaves on the ground of the seedling beds to reduce the overwintering pathogen sources. In summer, spray Bordeaux mixture or wettable powder of zinc omethoate 2-3 times for good disease control.
The above shares the specific content of the control methods for ash borer, and copying is prohibited without permission!